Abstract: A new united aerodynamic window is investigated and it combined the axial injection and vacuum pump together. The reformed window have many new character, the throat area can be adjusted by a circle valve and the multi-pole board is stored in injector, sealing cavity and suction cavity respectively. Many work have been done on it, the sealing quality and beam quality have been reported in the former work. The latest work is that a distance auto-motived system has been done. With the gas pressure in bottle is changing, the valve can be adjusted by the auto-motived system. And only one bottle can be enough to usage.It is joined with the COIL laser and works successfully. The latest results are the lowest sealing pressure is only 0.67KPa, the exhausted gas is 35g/s and the Strhl ratio is up t